How to link tables

I want to create a form where a user can type in an event, and date, then from a list of staff, select who is available to work. This needs to be saved, so a report can be printed. Also, the user needs to be able to able to type in another event for the same date, and select more staff, with a possibility of selecting the same staff, as they could work one event in the morning, and another in the afternoon. I just don't know how to link the tables up, when all I would have on the main form is the Event and date. The employee table has Employee ID as autonumber. Any suggestions.

If an employee can only be assigned to a single event doing a single position then I would also create a unique index that uses both the EE_EventID and EE_EmployeeID fields.

If an employee can be assigned to to multiple positions for single event and also to multiple positions then I would also create a unique index that uses the three fields EE_EventID, EE_EmployeeID, and EE_position.